Willie Jan
Allowing Ads
Hi,
I am doing a test where i use a kodak gray card, a white piece of painted wood and a black card & a usaf card.
This scene has a 5 stops (white to black paper) range, so no problem to get this onto film.
We now take a picture and develop it for gamma .65.
We now print it and take a look at it.
What's happened?
The black is black, the gray is gray, but the usaf card is not black but darker gray???
When we measure the density the gray card is about 0.65, the black area is 1.97 and the usaf card is 1.74. The black area is indead much darker than the black usaf card. But not dark gray as on the print?
Where did we make a mistake.
In our eyes we should have developed the film at a gamma 1 to get the right gray/black value as we see it which our eyes.
Willie.
I am doing a test where i use a kodak gray card, a white piece of painted wood and a black card & a usaf card.
This scene has a 5 stops (white to black paper) range, so no problem to get this onto film.
We now take a picture and develop it for gamma .65.
We now print it and take a look at it.
What's happened?
The black is black, the gray is gray, but the usaf card is not black but darker gray???
When we measure the density the gray card is about 0.65, the black area is 1.97 and the usaf card is 1.74. The black area is indead much darker than the black usaf card. But not dark gray as on the print?
Where did we make a mistake.
In our eyes we should have developed the film at a gamma 1 to get the right gray/black value as we see it which our eyes.
Willie.
